you'll be happier and healthier the more you know. >>> in september of 2006, doug johnson was walking on the beach, thinking about his friend of 30 years, the murdered one-time deejay, steven b. williams. >> and i see this light on the beach. and i thought, now, what can that be? i dropped my cell phone and it had landed face-up and the panel was lighting up and i walked over to it, and i picked it up and it was ken clark, detective clark, calling to tell me they had arrested harvey. it was a real great sense of relief. it was almost indescribable. >> reporter: which is, perhaps, where the movie version of this story would end. but real life is not quite like that. for all the suspicion of steven's friends, the murder case against harvey morrow was rather weak. no evidence sufficient to prove that harvey shot steven and dumped his body in the ocean. >> we were looking for steven's dna on the boat, knowing that his death was caused by a gunshot wound. it was pretty obvious that there should be something that said this is where it was. >> reporter: but there wasn't. no blood, no gun. no